This document specifies basic requirements for systems to execute notifications such as warning and awareness messages to provide hazard information to a driver.Requirements include principle of notifying, timing of notification, distance of notification, and information elements that should be included in messages.NOTE 1 Methods of implementing functions such as hazardous conditions detection, communication, and presentation to drivers are not specified in this document.NOTE 2 The formulae in Clause 5 and calculated concrete time or distance duration in Annex A are not normative elements but informative elements.